States

Remote metrology system (RMS) design concept (open access)

Remote metrology system (RMS) design concept

A 3D remote metrology system (RMS) is needed to map the interior plasma-facing components of the International Thermonuclear Experimental Reactor (ITER). The performance and survival of these components within the reactor vessel are strongly dependent on their precise alignment and positioning with respect to the plasma edge. Without proper positioning and alignment, plasma-facing surfaces will erode rapidly. A RMS design involving Coleman Research Corporation (CRC) fiber optic coherent laser radar (CLR) technology is examined in this study. The fiber optic CLR approach was selected because its high precision should be able to meet the ITER 0.1 mm accuracy requirement and because the CLR`s fiber optic implementation allows a 3D scanner to operate remotely from the RMS system`s vulnerable components. This design study has largely verified that a fiber optic CLR based RMS can survive the ITER environment and map the ITER interior at the required accuracy at a one measurement/cm{sup 2} density with a total measurement time of less than one hour from each of six or more vertically deployed measurement probes. The design approach employs a sealed and pressurized measurement probe which is attached with an umbilical spiral bellows conduit. This conduit bears fiber optic and electronic links plus …
Date: October 19, 1995
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Hazard categorization of K Basin water filtration upgrade project (open access)

Hazard categorization of K Basin water filtration upgrade project

This supporting document provides the hazards categorization for the K Basin Water Filtration Upgrade Project at K East. All activities associated with the project are less than Hazard Category 3, except for the handling of the ECO-ROK liners containing spent filter cartridges. All activities involving the handling of liners, containing spent cartridges, by monorail, forklift or mobile crane are classified as Hazard Category 3.
Date: October 19, 1995
Creator: Conn, K.R.
Object Type: Report
System: The UNT Digital Library
Tank 241-BX-112 tank characterization plan (open access)

Tank 241-BX-112 tank characterization plan

This document is a plan that identifies the information needed to address relevant issues concerning short-term and long-term safe storage and long-term management of Single-Shell Tank (SST) 241-BX-112
Date: October 19, 1995
Creator: Homi, C. S.
Object Type: Report
System: The UNT Digital Library
Economics and the evaluation of publicly funded energy R and D (open access)

Economics and the evaluation of publicly funded energy R and D

There are three major areas in which economics can contribute to the evaluation of federal R and D: assessment of net benefits, ex ante expected as well as ex post realized; tailoring of R and D portfolios to policy goals; and guiding the contractual organization of R and D production. Additionally, evaluation of R and D and scientific activity tend to be distinctly retrospective, principally because of the long lags between the initial production activity and the observability of consequences. Extending the purview of economic evaluation of R and D, they find ample opportunity for evaluation that can inform current R and D management practice. The conduct of R and D is organized through a series of explicit and implicit contracts designed to elicit long-term commitments by some agents while attempting to limit the commitment by others. It is natural to consider the efficiency with which R and D is conducted as a subject for economic inquiry, although in practice such inquiries generally are restricted to accounting exercises. In evaluating the efficiency with which R and D is done, the current ordinary practice is to look at labor rates and equipment and materials prices while considering quantities of those items …
Date: October 19, 1998
Creator: Jones, D.W. & Paik, I.K.
Object Type: Article
System: The UNT Digital Library
The cloud chamber as a field diagnostic tool (open access)

The cloud chamber as a field diagnostic tool

This document presents the Pros and Cons of using a cloud chamber for field use. Historical aspects are briefly discussed. A cloud chamber experiment on Midi Mist is described. Plans for fielding an experiment on Hupmobile are presented.
Date: October 19, 1967
Creator: Clark, A.
Object Type: Report
System: The UNT Digital Library
Basis for Interim Operation for the K-Reactor in Cold Standby (open access)

Basis for Interim Operation for the K-Reactor in Cold Standby

The Basis for Interim Operation (BIO) document for K Reactor in Cold Standby and the L- and P-Reactor Disassembly Basins was prepared in accordance with the draft DOE standard for BIO preparation (dated October 26, 1993).
Date: October 19, 1998
Creator: Shedrow, B.
Object Type: Report
System: The UNT Digital Library
FB Line Basis for Interim Operation (open access)

FB Line Basis for Interim Operation

The safety analysis of the FB-Line Facility indicates that the operation of FB-Line to support the current mission does not present undue risk to the facility and co-located workers, general public, or the environment.
Date: October 19, 1998
Creator: Shedrow, B.
Object Type: Report
System: The UNT Digital Library
Industrial ecology analysis - final report (open access)

Industrial ecology analysis - final report

This work is intended to contribute to the foundations for formalizing industrial ecology analyses of energy systems (systems for energy generation, transfer. or transformation) and to examine how the tools for performing these analyses can also enhance the field of industrial ecology in other applications. We discuss requirements for studying materials and energy , cycling in industrial processes. with particular emphasis on energy generating systems, through explicit inclusion of entropy concepts in industrial ecology considerations. This perspective is intended to contribute to the theoretical basis for industrial ecology, to the development of tools for comparing the ecological (human and environmental health. and institutional) impacts of energy generating and other industrial processes, and to possible changes in engineering curricula with emphasis on design.
Date: October 19, 1998
Creator: Kastenberg, W.E. & Lowenthal, M.D.
Object Type: Report
System: The UNT Digital Library
Douglas United Nuclear monthly report, September 1970 (open access)

Douglas United Nuclear monthly report, September 1970

This document contains information about the activities of Douglas United Nuclear at the Hanford Reservation during the month of September 1970.
Date: October 19, 1970
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Lead-free solder technology transfer from ASE Americas (open access)

Lead-free solder technology transfer from ASE Americas

To safeguard the environmental friendliness of photovoltaics, the PV industry follows a proactive, long-term environmental strategy involving a life-of-cycle approach to prevent environmental damage by its processes and products from cradle to grave. Part of this strategy is to examine substituting lead-based solder on PV modules with other solder alloys. Lead is a toxic metal that, if ingested, can damage the brain, nervous system, liver and kidneys. Lead from solder in electronic products has been found to leach out from municipal waste landfills and municipal incinerator ash was found to be high in lead also because of disposed consumer electronics and batteries. Consequently, there is a movement in Europe and Japan to ban lead altogether from use in electronic products and to restrict the movement across geographical boundaries of waste containing lead. Photovoltaic modules may contain small amounts of regulated materials, which vary from one technology to another. Environmental regulations impact the cost and complexity of dealing with end-of-life PV modules. If they were classified as hazardous according to Federal or State criteria, then special requirements for material handling, disposal, record-keeping and reporting would escalate the cost of decommissioning the modules. Fthenakis showed that several of today's x-Si modules failed …
Date: October 19, 1999
Creator: FTHENAKIS,V.
Object Type: Article
System: The UNT Digital Library
Experimental Program to Elucidate and Control Stimulated Brillouin and Raman Backscattering in Long-Scale Plasmas (open access)

Experimental Program to Elucidate and Control Stimulated Brillouin and Raman Backscattering in Long-Scale Plasmas

Laser-plasma instability is a serious concern for indirect-drive inertial confinement fusion (ICF), where laser beams illuminate the interior of a cavity (called a hohlraum) to produce X-rays to drive the implosion of a fusion capsule. Stimulated Raman and Brillouin backscattering (SRS and SBS) could result in unacceptably high laser reflectivities. Unfortunately, it is impossible at present to fully simulate these processes realistically. The authors experimental program aims to understand these instabilities by pursuing a dual strategy. (1) They use a gas-filled hohlraum design, which best approaches ignition-hohlraum conditions, on the Nova laser to identify important non linear trends. (2) They are shifting towards more fundamental experiments with a nearly diffraction-limited interaction laser beam illuminating extremely well characterized plasmas on the Trident laser facility at Los Alamos to probe the relevant fundamental processes.
Date: October 19, 1998
Creator: Fernandez, J. C.; Cobble, J. A.; Montgomery, D. S. & Wilke, M. D.
Object Type: Article
System: The UNT Digital Library
Fabrication of Machined and Shrink Fitted Impactor; Composite Liners for the Los Alamos HEDP Program (open access)

Fabrication of Machined and Shrink Fitted Impactor; Composite Liners for the Los Alamos HEDP Program

Composite liners have been fabricated for the Los Alamos liner driven HEDP experiments using impactors formed by physical vapor deposition (PVD), electroplating, machining and shrink fitting. Chemical vapor deposition (CVD) has been proposed for some ATLAS liner applications. This paper describes the processes used to fabricate machined and shrink fitted impactors which have been used for copper impactors in 1100 aluminum liners and 6061 T-6 aluminum impactors in 1100 aluminum liners. The most successful processes have been largely empirically developed and rely upon a combination of shrink fitted and light press fitting. The processes used to date will be described along with some considerations for future composite liners requirements in the HEDP Program.
Date: October 19, 1999
Creator: Randolph, B.
Object Type: Article
System: The UNT Digital Library
Exploring Ways to Improve Predictive Capability of Z-Pinch Calculations (open access)

Exploring Ways to Improve Predictive Capability of Z-Pinch Calculations

For some time 2-dimensional RMHD (radiation magneto-hydrodynamic) calculations of radiating z-pinches have been made to agree with integral data (current wave form, yield and power). For these calculations, the agreement with detailed data, such as time-resolved x-ray images, is generally not as good. Correctly modeling the physics of z-pinches, including detailed data, is needed to have true predictive capability. To address this problem, the authors first determine which integral data are most sensitive to the details in the models. With this information, they investigate aspects of the pinch, to which the data is sensitive, using non-standard techniques. For example, the pinch is calculated in (x,y)-geometry to investigate how a non-symmetric implosion affects the simulated data.
Date: October 19, 1998
Creator: Matuska, W.; Aubrey, J.; Bowers, R.; Lee, H.; Peterson, D.; Deeney, C. et al.
Object Type: Article
System: The UNT Digital Library
Magnetic Implosion for Novel Strength Measurements at High Strain Rates (open access)

Magnetic Implosion for Novel Strength Measurements at High Strain Rates

Recently Lee and Preston have proposed to use magnetic implosions as a new method for measuring material strength in a regime of large strains and high strain rates inaccessible to previously established techniques. By its shockless nature, this method avoids the intrinsic difficulties associated with an earlier approach using high explosives. The authors illustrate how the stress-strain relation for an imploding liner can be obtained by measuring the velocity and temperature history of its inner surface. They discuss the physical requirements that lead us to a composite liner design applicable to different test materials, and also compare the code-simulated prediction with the measured data for the high strain-rate experiments conducted recently at LANL. Finally, they present a novel diagnostic scheme that will enable us to remove the background in the pyrometric measurement through data reduction.
Date: October 19, 1998
Creator: Lee, H.; Preston, D. L.; Bartsch, R. R.; Bowers, R. L.; Holtkamp, D. & Wright, B. L.
Object Type: Article
System: The UNT Digital Library
Solid State Power Amplifier for 805 MegaHertz at the Los Alamos Neutron Science Center (open access)

Solid State Power Amplifier for 805 MegaHertz at the Los Alamos Neutron Science Center

Particle accelerators for protons, electrons, and other ion species often use high-power vacuum tubes for RF amplification, due to the high RF power requirements to accelerate these particles with high beam currents. The final power amplifier stages driving large accelerators are unable to be converted to solid-state devices with the present technology. In some instances, radiation levels preclude the use of transistors near beamlines. Work is being done worldwide to replace the RF power stages under about ten kilowatts CW with transistor amplifiers, due to the lower maintenance costs and obsolescence of power tubes in these ranges. This is especially practical where the stages drive fifty Ohm impedance and are not located in high radiation zones. The authors are doing this at the Los Alamos Neutron Science Center (LANSCE) proton linear accelerator (linac) in New Mexico. They replaced a physically-large air-cooled UHF power amplifier using a tetrode electron tube with a compact water-cooled unit based on modular amplifier pallets developed at LANSCE. Each module uses eight push-pull bipolar power transistor pairs operated in class AB. Four pallets can easily provide up to 2,800 watts of continuous RF at 805 MHz. A radial splitter and combiner parallels the modules. This amplifier …
Date: October 19, 1998
Creator: Davis, J.L. & Lyles, J.T.M.
Object Type: Article
System: The UNT Digital Library
Magnetized Target Fusion (MTF): A Low-Cost Fusion Development Path (open access)

Magnetized Target Fusion (MTF): A Low-Cost Fusion Development Path

Simple transport-based scaling laws are derived to show that a density and time regime intermediate between conventional magnetic confinement and conventional inertial confinement offers attractive reductions in system size and energy when compared to magnetic confinement and attractive reductions in heating power and intensity when compared to inertial confinement. This intermediate parameter space appears to be readily accessible by existing and near term pulsed power technologies. Hence, the technology of the Megagauss conference opens up an attractive path to controlled thermonuclear fusion.
Date: October 19, 1998
Creator: Lindemuth, I.R.; Siemon, R.E.; Kirkpatrick, R.C. & Reinovsky, R.E.
Object Type: Article
System: The UNT Digital Library
Application of 2-D Simulations to Z-Pinch Experiment Design and Analysis (open access)

Application of 2-D Simulations to Z-Pinch Experiment Design and Analysis

The successful 2-D simulations of z-pinch experiments (reproducing such features as the measured experimental current drive, radiation pulse shape, peak power and total radiated energy) can lead to a better understanding of the underlying physics in z-pinch implosions and to the opportunity to use such simulations in the analysis of experimental data and in the design of new experiments. Such use has been made with LANL simulations of experiments on the Sandia Saturn and Z accelerators. Applications have included ''vacuum'' and ''dynamic'' hohlraum experiments; variations in mass, radius and length; and ''nested'' array configurations. Notable examples include the explanation of the power/length results in reduced length pinches and the prediction of the current best power and pulsewidth nested array experiment. Examples of circumstances where the simulation results do not match the experiments will be given along with a discussion of opportunities for improved simulation results.
Date: October 19, 1998
Creator: Peterson, D. L.; Bowers, R. L.; Matuska, W.; Chandler, G. A.; Deeney, C.; Derzon, M. S. et al.
Object Type: Article
System: The UNT Digital Library
1999 annual progress report -- Energy conservation team (open access)

1999 annual progress report -- Energy conservation team

This report highlights progress achieved during FY 1999 under the Light-duty Fuels Utilization R and D Program. The program is comprised of two elements: the Advanced Petroleum-Based APB Fuels Program which focused on developing and testing advanced fuels for use with compression-ignition direct-injection (CIDI) engines and fuel cells and the Alternative Fuels Program which focused on Natural gas and natural gas derived fuels. The report contains 17 summaries of industry and National Laboratory projects. Fuel efficient vehicles with very low emissions are essential to meet the challenges of climate change, energy security, and improved air quality. The authors anticipate cooperative efforts with the auto and energy industries to develop new and innovative technologies that will be used to make advanced transportation vehicles that are fuel efficient, clean, and safe.
Date: October 19, 1999
Creator: Chalk, S.
Object Type: Report
System: The UNT Digital Library
RULLI/a Photon Counting Imager (open access)

RULLI/a Photon Counting Imager

The Remote Low Light Imaging (RULLI) system responds to individual photons using a modification to conventional image intensifier technology and fast timing electronics. Each photon received at the detector is resolved in three dimensions (X, Y, and time). The accumulation of photons over time allows the system to image with very low light levels, such as starlight illumination. Using a low power pulsed laser and very fine time discrimination, three dimensional imaging has been accomplished with a vertical resolution of five cm.
Date: October 19, 1998
Creator: Albright, K. L.; Smith, R. C.; Ho, C.; Wilson, S. K.; Bradley, J.; Bird, A. et al.
Object Type: Article
System: The UNT Digital Library
Use of X-Ray Microbeams for Depth Profiling of MeV Ion Implantation Induced Defect Clusters in Si (open access)

Use of X-Ray Microbeams for Depth Profiling of MeV Ion Implantation Induced Defect Clusters in Si

None
Date: October 19, 1998
Creator: Yoon, M.; Larson, B. C.; Tischler, J. Z.; Haynes, T. E.; Chung, J.-S.; Ice, G. E. et al.
Object Type: Article
System: The UNT Digital Library
Operational experience with nuclear glovebox transfer systems at Argonne National Laboratory - West. (open access)

Operational experience with nuclear glovebox transfer systems at Argonne National Laboratory - West.

None
Date: October 19, 2000
Creator: Burke, L. L. & Kirschner, D. S.
Object Type: Article
System: The UNT Digital Library
Oak Ridge 25URC Tandem Accelerator 2001 SNEAP Lab Report (open access)

Oak Ridge 25URC Tandem Accelerator 2001 SNEAP Lab Report

Radioactive ion beam production and development at the Holifield Radioactive Ion Beam Facility (HRIBF) will be detailed in a talk at this conference. A highlight during this period, however, has been providing A{approx}130 neutron-rich RIBs at energies up to {approx}4 MeV/nucleon. At the present time, the HRIBF is the only facility in the world capable of providing such beams.
Date: October 19, 2001
Creator: Meigs, MJ
Object Type: Article
System: The UNT Digital Library
Low Loss Composition of BA{sub X}SR{sub Y}CA{sub 1-X-Y}TIO{sub 3}:BA{sub 0.12-0.25}SR{sub 0.35-0.47}CA{sub 0.32-0.53}TIO{sub 3} (open access)

Low Loss Composition of BA{sub X}SR{sub Y}CA{sub 1-X-Y}TIO{sub 3}:BA{sub 0.12-0.25}SR{sub 0.35-0.47}CA{sub 0.32-0.53}TIO{sub 3}

A dielectric thin-film material for microwave applications, including use as a capacitor, the thin-film comprising a composition of barium strontium calcium and titanium of perovskite type (Ba{sub x}Sr{sub y}Ca{sub 1-x-y})TiO{sub 3}. Also provided is a method for making a dielectric thin film of that formula over a wide compositional range through a single deposition process.
Date: October 19, 1999
Creator: Xiang, Xiao-Dong; Chang, Hauyee & Takeuchi, Ichiro
Object Type: Patent
System: The UNT Digital Library
Summary of Granulation Matrix Testing for the Plutonium Immobilization Program (open access)

Summary of Granulation Matrix Testing for the Plutonium Immobilization Program

In FY00, a matrix for process development testing was created to identify those items related to the ceramic process that had not been fully developed or tested and to help identify variables that needed to be tested. This matrix, NMTP/IP-99-003, was jointly created between LLNL and SRTC and was issued to all affected individuals. The matrix was also used to gauge the progress of the development activities. As part of this matrix, several series of tests were identified for the granulation process. This summary provides the data and results from the granulation testing. The results of the granulation matrix testing were used to identify the baseline process for testing in the PuCTF with cold surrogates in B241 at LLNL.
Date: October 19, 2001
Creator: Herman, C. C.
Object Type: Report
System: The UNT Digital Library